[j-nsp] mpls node-protection: LSP down

Mihai Gabriel mihaigabriel at gmail.com
Fri Aug 10 04:57:39 EDT 2012


Hello,

 I am trying to test the node-protection feature in a lab using an MX5
router with logical-systems and I can't find the reason why is not
working.The topology I use is here:
http://imageshack.us/photo/my-images/849/avpn.png/
All routers are configured for mls,rsvp,ospf,link-protection, but when I
disable the interface between P1 and PE1, the LSP between PE1 and PE2 goes
down and stay that way:

Before disabling the interface:

mumulox at mx5t> show mpls lsp logical-system PE1 extensive
Ingress LSP: 1 sessions

192.168.1.2
  From: 192.168.1.1, State: Up, ActiveRoute: 0, LSPname: pe1-to-pe2
  ActivePath: strict-path (primary)
  Node/Link protection desired
  LSPtype: Static Configured
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
  Revert timer: 1
 *Primary   strict-path      State: Up
    Priorities: 7 0
    OptimizeTimer: 1
    SmartOptimizeTimer: 2
    Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node
10=SoftPreempt 20=Node-ID):
          192.168.5.1(flag=0x29) 172.22.210.2(flag=9 Label=301600)
192.168.5.2(flag=0x29) 172.22.201.2(flag=9 Label=301472)
192.168.5.3(flag=0x21) 172.22.206.2(flag=1 Label=301200)
192.168.1.2(flag=0x20) 172.22.212.1(Label=3)

mumulox at mx5t> show mpls path strict-path logical-system PE1
Path name                        Address         strict/loose if-id
strict-path                      172.22.210.2    strict<empty>

mumulox at mx5t> show rsvp session logical-system PE1
Ingress RSVP: 2 sessions
To              From            State   Rt Style Labelin Labelout LSPname
192.168.1.2     192.168.1.1     Up       0  1 SE       -   301600 pe1-to-pe2
192.168.5.2     192.168.1.1     Up       0  1 SE       -   301296
Bypass->172.22.210.2->172.22.201.2
Total 2 displayed, Up 2, Down 0

mumulox at mx5t> show route table inet.3 logical-system PE1 192.168.1.2
extensive

inet.3: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
192.168.1.2/32 (1 entry, 1 announced)
        State: <FlashAll>
        *RSVP   Preference: 7/1
                Next hop type: Router, Next hop index: 1048577
                Address: 0x2c74010
                Next-hop reference count: 7
                Next hop: 172.22.210.2 via ge-1/1/7.100 weight 0x1, selected
                Label-switched-path pe1-to-pe2
                Label operation: Push 301600
                Label TTL action: prop-ttl
                Next hop: 172.22.211.2 via ge-1/1/7.104 weight 0x8001
                Label-switched-path Bypass->172.22.210.2->172.22.201.2
                Label operation: Push 301472, Push 301296(top)
                Label TTL action: prop-ttl, prop-ttl(top)
                State: <Active Int>
                Local AS: 65512
                Age: 4:33 Metric: 4
                Task: RSVP
                Announcement bits (1): 1-Resolve tree 1
                AS path: I

After disabling the interface:

mumulox at mx5t> show mpls lsp extensive logical-system PE1
Ingress LSP: 1 sessions

192.168.1.2
  From: 192.168.1.1, State: Dn, ActiveRoute: 0, LSPname: pe1-to-pe2
  ActivePath: (none)
  Node/Link protection desired
  LSPtype: Static Configured
  LoadBalance: Random
  Encoding type: Packet, Switching type: Packet, GPID: IPv4
  Revert timer: 1
  Primary   strict-path      State: Dn
    Priorities: 7 0
    OptimizeTimer: 1
    SmartOptimizeTimer: 2
   199 Aug 10 12:04:44.607 Deselected as active
   198 Aug 10 12:04:44.607 172.22.205.1: Non-RSVP capable router detected
   197 Aug 10 12:04:44.607 Link-protection Down
   196 Aug 10 12:04:44.606 Session preempted
   195 Aug 10 12:04:44.504 172.22.210.1: Tunnel local repaired
   194 Aug 10 12:04:44.504 172.22.210.1: Down

"198 Aug 10 12:04:44.607 172.22.205.1: Non-RSVP capable router detected"
seems to be very clear,but it is not, because all routers are rsvp enabled

mumulox at mx5t> show rsvp neighbor logical-system P2
RSVP neighbor: 3 learned
Address            Idle Up/Dn LastChange HelloInt HelloTx/Rx MsgRcvd
172.22.201.1          0 13/12      23:49        1 84288/84248 2908
172.22.206.2          0  1/0  2d 20:02:20        1 92707/92707 4944
172.22.205.2          0  1/0  2d 18:30:33        1 92114/92114 6789

Any advice?

Thanks


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